4246: In India people migrate from the countryside to the towns while in the U.S.A. it is just the other way. What is the reason for this?
(a) In U.S.A. people like the countryside more than the cities
(b) Use of urban land for purposes other than that of residence
(c) Lack of security of life and property in cities
(d) Lack of employment opportunities in cities
4247: In a class there are 18 boys who are over 160 cm tall. If these constitute three- fourths of the boys and the total number of boys is two-thirds of the total number of students in the class, what is the number of girls in the class?
(a) 24
(b) 6
(c) 12
(d) 18
4248: Huangpu River flows through which one of the following cities?
(a) Beijing
(b) Shanghai
(c) Ho Chi Minh City
(d) Manila
4249: Who won the title in the finals of French Open men's singles tennis championship in the year 2002?
(a) Albert Costa
(b) Juan Carlos Ferrero
(c) Andre Agassi
(d) Pete Sampras
4250: Who among the following discovered heavy water?
(a) Joseph Priestley
(b) Heinrich Hertz
(c) H. C. Urey
(d) G. Mendel